Hello Matt Cook,
The Bible actually says that man's years are 70 years, and after that is strength. The 120 years in Genesis was a reference to the flood coming in 120 years, therefore not the longevity of the average person (Psalm 90:10). I know of what I say, as I have a Master of Divinity, and I hate when the Bible is misread and misstated, and then people say it is contradictory! So I don't know what you are selling, but the Bible does not back you up.